Which company owns MAC address prefix 78:98:FD?

MAC address prefix 78:98:FD is registered to Q9 Networks Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:98:FD has a network interface built by Q9 Networks Inc..

What is the OUI 78:98:FD?

78:98:FD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Q9 Networks Inc.. It covers every address from 78:98:FD:00:00:00 to 78:98:FD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-98-FD.

How do I find the manufacturer of a MAC address?

Take the first three octets of the address — in 78:98:FD:00:00:00 that is 78:98:FD — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.

Where is Q9 Networks Inc. located?

Q9 Networks Inc. is listed at Suite 4400, PO Box 235 Toronto ON CA M5K 1J3 in the IEEE OUI registry entry for 78:98:FD. This is the address the organization registered with the IEEE, which may differ from its current operating address.

Q9 Networks Inc.

MAC address prefix 78:98:FD is registered to Q9 Networks Inc. in the IEEE OUI registry. Any device whose MAC address begins with 78:98:FD has a network interface built by Q9 Networks Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address — it covers every MAC from 78:98:FD:00:00:00 to 78:98:FD:FF:FF:FF.

OUI prefix: 78:98:FD
Hyphen form: 78-98-FD
MAC range: 78:98:FD:00:00:00 – 78:98:FD:FF:FF:FF
Addresses in block: 16,777,216
Organization: Q9 Networks Inc.
Address: Suite 4400, PO Box 235 Toronto ON CA M5K 1J3
Source: IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.

Assignment history (2)

The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.

2016-07-29Assigned to "Q9 Networks Inc."
archived source →
2026-07-17Assigned to "Q9 Networks Inc."

Nearby in the registry

The prefixes assigned immediately before and after 78:98:FD:

FAQ

Which company owns MAC address prefix 78:98:FD?: MAC address prefix 78:98:FD is registered to Q9 Networks Inc. in the IEEE Organizationally Unique Identifier (OUI) registry. Any device whose MAC address begins with 78:98:FD has a network interface built by Q9 Networks Inc..
What is the OUI 78:98:FD?: 78:98:FD is an Organizationally Unique Identifier — the first three octets (24 bits) of a MAC address, assigned by the IEEE to Q9 Networks Inc.. It covers every address from 78:98:FD:00:00:00 to 78:98:FD:FF:FF:FF, or 16,777,216 addresses in total. It is also written 78-98-FD.
How do I find the manufacturer of a MAC address?: Take the first three octets of the address — in 78:98:FD:00:00:00 that is 78:98:FD — and look that prefix up in the IEEE OUI registry. If the second-lowest bit of the first octet is set, the address is locally administered (a randomized or private MAC), which belongs to no manufacturer and will not resolve; modern phones and laptops use these by default on each network.
Where is Q9 Networks Inc. located?: Q9 Networks Inc. is listed at Suite 4400, PO Box 235 Toronto ON CA M5K 1J3 in the IEEE OUI registry entry for 78:98:FD. This is the address the organization registered with the IEEE, which may differ from its current operating address.